Utility knife



FIG. 1 is a perspective view looking down at the front and lefthand sideof a utility knife embodying my new design;

FIG. 2 is a left side elevational view thereof,

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a front elevational view thereof.

The broken line portions of the disclosure are for illustrative purposesonly and form no part of the claimed design.

The ornamental design for a utility knife, as shown and described.